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Riding an Ion Drive to the Asteroid Belt
Iron Condor writes "JPL is now close to embarking on another of its trademark, one-of-a-kind missions, this time to the heart of the asteroid belt: The Dawn mission is being prepared for launch this summer from Kennedy Space Center. Dawn will explore Ceres and Vesta, the two largest known asteroids in our solar system, which lie in the vast expanse between Mars and Jupiter. In the process, the mission will make history on several fronts. Besides being the first spacecraft to orbit a main-belt asteroid and the first to ever orbit two targets after leaving Earth, Dawn will be the first science mission powered by electric ion propulsion, the world's most advanced and efficient space propulsion technology."
Aren't ions charged (or charge-stripped) particles? Do we really need to say "electric ions"? Is there another kind?
It's nice to see well thought out and efficient science experiments like this one. The asteroids in our solar system are probably more valuable to us in the short term than any of the planets or moons, with the exception of our own moon. I remember an estimate of how much iron is in the asteroid belt once and its enough to cover the earth several times over.
As scary or foolish as it may seem, our only future is to get off this rock and learn to live in space. Mars is El Dorado, worthless except in the minds of poets and dreamers. There may be hope for purchase on some of the moons, but to get to them or Mars we'll have to have already adapted to space.
I don't think it will work with out fusion, but if they find gold or oil in one of those rocks, who knows what could happen.